不同桩基加固参数对既有桥梁抗震性能的影响  

Influence of different pile foundation reinforcement parameters on the seismic performance of existing bridges

作　　者：杜程 范一娜 DU Cheng;FAN Yina(Shandong Provincial Communications Planning and Design Institute Group Co.,Ltd.,Shandong Jinan 250101 China)

机构地区：[1]山东省交通规划设计院集团有限公司,山东济南250101

出　　处：《山东交通科技》2022年第4期54-56,115,共4页

摘　　要：针对某既有桥梁桩基加固工程,基于数值模拟方法,对不同桩基加固参数下的地震响应效果进行了对比研究。结果表明:当采用增设桩基对既有病害桥梁进行加固时,应尽量采用桩径相同、桩数多且桩径适宜的加固方案,避免采用异径结构加固方案;横桥向弯矩出现在桩基顶面,在进行结构设计时,应加强此处抵抗屈服弯矩的能力;最大位移出现在墩顶顶面,建议通过支座的加固来减小对桥梁上部结构位移的影响。For an existing bridge pile foundation reinforcement project,based on the numerical simulation method,the seismic response effects under different pile foundation reinforcement parameters are compared.The results show that when adding pile foundation to strengthen the existing diseased bridge,the reinforcement scheme with the same pile diameter,a large number of piles and appropriate pile diameter should be adopted as far as possible,and the reinforcement scheme of reducing diameter structure should be avoided;The transverse bending moment of the bridge appears on the top surface of the pile foundation.During the structural design,the ability to resist the yield bending moment should be strengthened.The maximum displacement occurs on the top surface of the pier top.It is suggested to reduce the influence on the displacement of the bridge superstructure through the reinforcement of the bearing.

关 键 词：桥梁 桩基加固 地震响应 桩径 桩数 

分 类 号：U442.55[建筑科学—桥梁与隧道工程]